fix: types (#42)

composer.json

@@ -14,6 +14,7 @@
         "issues": "http://github.com/heyday/silverstripe-elastica/issues"
     },
     "require": {
+        "php": ">=8.1",
         "ruflin/elastica": "^7",
         "elasticsearch/elasticsearch": ">=7.3.0",
         "symbiote/silverstripe-queuedjobs": "*"
@@ -30,7 +31,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-main": "4.1.x-dev"
+            "dev-main": "4.2.x-dev"
         }
     },
     "minimum-stability": "dev",

src/ResultList.php

@@ -143,9 +143,9 @@ public function getResults()
     }
 
     /**
-     * @return ArrayIterator|Traversable
+     * @return Traversable
      */
-    public function getIterator()
+    public function getIterator(): Traversable
     {
         return new ArrayIterator($this->toArray());
     }
@@ -155,7 +155,7 @@ public function getIterator()
      * @param  int $offset
      * @return ResultList
      */
-    public function limit($limit, $offset = 0)
+    public function limit(?int $limit, int $offset = 0): Limitable
     {
         $list = clone $this;
 
@@ -395,7 +395,7 @@ public function getTotalItems()
     /**
      * @inheritdoc
      */
-    public function offsetExists($offset): bool
+    public function offsetExists(mixed $offset): bool
     {
         $array = $this->toArray();
         return array_key_exists($offset, $array);
@@ -404,7 +404,7 @@ public function offsetExists($offset): bool
     /**
      * @inheritdoc
      */
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset): mixed
     {
         $array = $this->toArray();
         return isset($array[$offset]) ? $array[$offset] : null;